Merge pull request #809 from andradei/patch-1

Correct command that lists config options

Author: nrc

README.md

@@ -90,7 +90,7 @@ notes above on running rustfmt.
 
 Rustfmt is designed to be very configurable. You can create a TOML file called
 rustfmt.toml, place it in the project directory and it will apply the options
-in that file. See `cargo run -- --config-help` for the options which are available,
+in that file. See `rustfmt --config-help` for the options which are available,
 or if you prefer to see source code, [src/config.rs](src/config.rs).
 
 By default, Rustfmt uses a style which (mostly) conforms to the